anexanhume
Veteran
The situation is kinda different now though, isn't it?
Back then, Sony had just one PS4 model; now they have two already. With a "PS5" (let's call it, and we'll also assume it's fully backwards compatible too because anything else would be nonsense); then they'd have 3 consoles in their stable; that's kinda crowded, don't you think?! So which one are they going to discontinue, Pro, after so short a run on the market? It'd look bad and would annoy those who bought it.
They're NOT going to discontinue PS4 vanilla; that's their entry level model, the most affordable one with the highest sales potential. So they'd be inbetween a rock and a hard place I'd say. 3 consoles would cannibalize sales from each other, but there's no good strat for eliminating one console.
If you instead wait until at least fall of 2020; by then vanilla PS4 will start looking rather long in the tooth, putting it out to pasture might not be such a bad idea then, and PS4 Pro could thusly be moved down a notch in the pecking order. There's now room at the top for a new heavyweight champion; "PS5".
The Pro will always be appreciably more expensive to produce than the slim. They’ll want the lowest base price possible for a legacy console. I don’t see how the Pro lives after PS5 is launched. It’s not going to appreciably affect cross gen games, and once everyone has moved onto PS5, the power difference won’t matter at all IMO. People who want power will buy PS5. People who want cheap access will buy super slim or whatever.